Legal analysis: If a consumer finds a cockroach in a restaurant, he should keep the evidence and make a complaint to the health supervision department in time. If there is an adverse reaction after eating, you need a hospital certificate (such as medical records and outpatient records), and the hotel will be responsible for the related expenses such as medicine.

legal basis: article 23 of the product quality law of the people's Republic of China, social organizations that protect consumers' rights and interests can suggest that the relevant departments should be responsible for handling the product quality problems reflected by consumers, and support consumers to sue the people's courts for the damage caused by product quality.

law of the people's Republic of China on the protection of consumers' rights and interests article 15 consumers have the right to supervise goods and services and the protection of consumers' rights and interests. Consumers have the right to report and accuse violations of consumers' rights and interests, as well as illegal and dereliction of duty of state organs and their staff in protecting consumers' rights and interests, and have the right to criticize and make suggestions on protecting consumers' rights and interests.